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25cm3 of NaOH (2M) were titrated with 1.25M H2SO4. Write down the balanced reaction equation. Calculate the number of moles of NaOH used in the titration and hence deduce the volume of sulfuric acid used in the titration. Give your answer in dm3.

2NaOH + H2SO4 -> 2H2O + Na2SO4. moles = concentration x volume. #moles NaOH = 2M x (25/1000)dm3 = 0.05 mol. The reaction equations shows the ratio of alkali to acid is 2:1. The number of moles of H2SO4 re...
TW
Answered by Tiffany W. • Chemistry tutor
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How to answer the question: How does a bicarbonate buffer solution control pH when either an acid or a base is added?

A buffer solution is resistant to changes in pH upon the addition of relatively small amounts of acid or base. In this case, the equilibrium resisting changes to the pH is: H2CO3 <-> H+ + HCO3-. Upon a...
HJ
Answered by Harvey J. • Chemistry tutor
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How to use properly conjunctions in a French essay?

In French we have two types of conjunctions. The coordination conjunctions link words or groups of words together using words such as: mais, où, et, donc, or, ni, car. They show union, consequences, conclusi...
RM
Answered by Roxane M. • French tutor
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How should I achieve a top grade (6 or 7) on Spanish B HL Paper 2?

Paper 2 is about two things: prowess with the language and structural strategy. To acquire linguistic ability, it is necessary to practice writing text in Spanish at least twice a week. The only way that one...
LB
Answered by Laurent B. • Spanish tutor
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Solve the following definite integral from x=2 to x=-1: ((x^4) + 3(x^2) + 2) dx

GENERAL PROCEDURE -- To solve this equation you can separate and integrate each term on its own and then add each integral together. To find the definite answer: Substitute "x=2" into the integrate...
HW
Answered by Harriet W. • Maths tutor
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